To provide a beautifully arranged posture and a reinforced chest support to a female wearer performing athletic actions.

This brassier sports top has shoulder-crossing harness 12, 14 surrounding shoulders and backward energizing the shoulder, cross braces 16, 18 connected to the shoulder-crossing harness 12, 14 so that the shoulder-crossing harness 12, 14 cross between shoulder bones, a support band 22 extended through a slip sleeve 24 and surrounding the chest and the body below the shoulder bones, chest tension-imparting panels 26, 28 connecting the shoulder harness 12, 14 to the slip sleeve 24 and tightening and restraining the chest to prevent the damage of chest tissues, and detachable connectors 32, 36 enabling the attachment or detachment of the chest tension-imparting panels 26, 28.